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我科自1982年6月至1983年7月对海军三个单位718名中年科技干部进行龋病及牙周病调查,兹就其发病情况统计分析如下。(一)一般资料
Our department from June 1982 to July 1983 on the Navy three units of 718 middle-aged science and technology cadres for caries and periodontal disease survey, the incidence of this statistical analysis is as follows. (A) general information